Chemical Vapor Deposition

Graphene Industry Applications & Growth

PVI’s Graphene Production System provides solar, electronics, optics, photonics, transistors, energy and sensors. Chemical vapor deposition is accelerating the growth and commercial use of Graphene.

  • Low Defects
  • Easily Scalable
  • Consistent Uniformity
  • Precise control of layering
  • Graphene films are easily transferred to other surfaces
  • Layers can be deposited one at a time for improved testing and performance

In Collaboration with


Graphene Production

Large Scale and Single-Crystal Monolayer Graphene Growth

Roll-to-roll production of 30-inch graphene films for transparent electrodes

Nature Nanotechnology 5 (2010) 574-578

Monolayer of graphene supported on flexible polymer substrates with sheet resistance < 125 Ω/sq and > 97% transparency. Layer-by-layer stacking achieved four-layer films with sheet resistance < 30 Ω/sq and > 90% transparency.

Wafer-Scale Growth of Single-Crystal Monolayer Graphene on Reusable Hydrogen-Terminated Germanium

Science 344 (2014) 286-289

Single crystal monolayer graphene exhibited superior electronic and optical qualities compared to multi-grain, multi-layer graphene films. Predefined orientation in the as-grown single-crystal graphene facilitated etch-free dry transfer process.

Graphene Based Solar Cells

Grown using Chemical Vapor Deposition Process Technology

Doping leads to new efficiency record for graphene solar cells

High Efficiency Graphene Solar Cells by Chemical Doping

Nano Letters 14 (2014) 5148-515

Graphene were grown on Cu by Chemical Vapor Deposition. Graphene-based Schottky junction solar cell. Doping graphene with trifluoromethanesulfonyl-amide (TFSA) improved the graphene/n-Si solar cells from 1.9 to 8.6 percent.

MIT develops the world’s most efficient transparent graphene electrode for polymer solar cells

Flexible Graphene Electrode-Based Organic Photovoltaics with Record-High Efficiency

Nano Letters 12 (2012) 2745-2750

To address chemical and mechanical instability of currently used indium tin oxide (ITO), graphene has been suggested as a promising flexible transparent electrode. Flexible transparent graphene-based electrode for graphene polymer solar cells (PSC). Graphene anode- and cathode-based flexible PSCs with record-high power conversion efficiencies of 6.1 and 7.1%, respectively.

Silicon Nanowire Industry Uses & Growth

Using Chemical Vapor Deposition Process Technology

PVI’s Graphene Production System provides to solar cells, batteries/electronics, and solar fuel generators. Chemical Vapor Deposition system for large-area vapor-liquid-solid catalyzed silicon microwire growth. This computer-controlled system is equipped for up to 6” wafer capacity.

In Collaboration with


Silicon Microwire Technology

Using Chemical Vapor Deposition Process Technology

High fatality, wafer-scale silicon microwire arrays by vapor-liquid-solid (VLS) growth.

High electronic quality with well-controlled doping densities. (>>30 um carrier diffusion length. <<50 cm s-1 surface recombination velocity. 6 orders of magnitude tunability of doping concentration.) Full tunability of wire architectures and optical properties. Cheap precursors and atmospheric growth process for technology scale-up. Re-use of the Si substrates with versatile wire transfer process onto flexible polymer films.

Si Microwire Applications


High fatality, wafer-scale silicon microwire arrays by vapor-liquid-solid (VLS) growth

Solar Fuel Generator

Making hydrogen from sunlight and water at 10% efficiency using Si microwires

Solar Cells

Efficient and stable Si micro-wire solar cells using atmosphere pressure Chemical Vapor Deposition

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